Unit Heater Services

Maintenance, Repair & Installation



MONARCH HEATING AND COOLING LLCstarstarstarstarstar5.0 / 5

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Reliable heat when you need it

Unit heaters are a great choice when looking for an effective and efficient way to heat shops, garages, workshops and backyard greenhouses.


Monarch Forced Air Heating and Cooling carries Armstrong Air furnace systems.

Modine's Hot Dawg is widely recognized as the industry's most popular residentially-certified gas-fired unit heater, with six sizes available from 30,000 - 125,000 BTUs. It is an ideal solution for residential garages and workshops, along with light commercial or industrial applications.

To commemorate Modine's 100th anniversary, the Special Edition black unit is now available, along with three appearance kits. These kits fit any new or existing Hot Dawg unit from 30,000 - 75,000 BTUs. Choose from:

  • Huntin' Dawg – perfect for sportsmen & hunters
  • Diamond Dawg – a great compliment to any car or motorcycle enthusiasts garage
  • Custom temperature control – spruce up your standard Hot Dawg with this exciting option


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Modine Unit Heaters


Hot Dawg Unit Heaters by Modine.

Benefits

  • Use your workspace - comfortably - year-round
  • Only Modine offers numerous colors and appearance kits, letting you heat your space in style
  • Free up more workspace by getting rid of space heaters that clutter up the area
  • Quieter garage with the Hot Dawg thanks to noise levels less than other units
  • Units work with propane or natural gas and conversion kits are available too in case you change heating sources
  • Trouble-free motor dependability
  • Simplified side-wall or roof venting with small-diameter vent pipes

Features & Options

  • Hush-puppy quiet operation
  • Right or left hand controls available on 30-75 units by rotating unit 180 degrees
  • 10 year warranty on heat exchanger
  • Lightweight, easy installation 1" from ceiling
  • Operates with natural or propane gas
  • Power vented model simplifies side-wall or roof venting with small-diameter vent pipe
  • Finger-proof fan guards on all units
  • Permanently lubricated motor
  • Controls can be either single or two-stage, direct spark ignition, 100% shut-off with continuous retry
  • Certified for residential, commercial and industrial use
  • Made in the USA
  • Comes in standard grey/green or optional black Special Edition
  • Three appearance kits available - Huntin' Dawg, Diamond Dawg, Carbon Fiber
  • Other models available include blower model (HDB), separated combustion (HDS) and separated combustion with blower (HSB)

Enjoy your garage all winter long with the comfort of a unit heater from Modine.

When you need help with your unit heater system in the Gallatin Valley area, heating repair technicians from Monarch Forced Air Heating and Cooling are ready and waiting to assist you.


  • Monarch Forced Air Heating & Cooling provides maintenance and repair to all makes and models of unit heaters.
  • Our expert team installs industry leading high-efficiency Hot Dawg Unit Heaters by Modine.